[GRASSLIST:2371] Smoothing resampled DEMs. How do I?

[Geotronix]

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Hi.

I'm trying to compute rainfall maps with topography influence. However
my DEM has a too high resolution so I want to resample it from 5m ->
25m. Ok. FOr this I change region settings and use r.resample. But how
do I smooth the dem? It becomes real patchy ...

THanks

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